Upcoming combined features of an event calendar and a social networking site. Primarily, the site was a searchable, browsable repository of upcoming events, such as music concerts, art exhibits, and conferences. Event information was primarily contributed by the user community, although in its later years, an increasing percentage of event data originated from commercial sources. Users could indicate their plans by marking that they are "watching" or "going" to an event. Users could also establish "friend" relationships with each other and receive notifications about what their friends were attending. Upcoming also offered users reminders via email or SMS when a particular event was about to occur. The site switched to the Yahoo! user accounts system in early 2007, and changed its domain name to upcoming.yahoo.com. At the same time, the site formally changed its name from "Upcoming.org" to simply "Upcoming". Despite this, many users of the site still link to and refer to the site as "Upcoming.org".
As of 2008, the overwhelming majority of users and events were located in North America, particularly among fans of independent music, web technologists, and the San Francisco Bay Area. However, Upcoming users could be found almost anywhere on the globe, often submitting event data in their local language. Upcoming was fully capable of storing and searching multilingual content, although the site sported only a US-English interface.
In April 2013, Yahoo announced the retirement of Upcoming.